Does your macbook pro crashes on startup ? This is quite a frustrating situation as the Mac system will not boot and you will not be able to perform any operation on it. You will also not be able to access any of your stored data in the Mac drive. The possible reason why macbook pro crashes on startup could be that the Mac OS X has been corrupted because of sudden shut down of the system, hard drive corruption, virus infection. The only way to fix this issue is to format the drive and reinstall the operating system and it will also lead to data loss. After the macbook pro crashes on startup issue is solved you can restore the data using the backup. Time machine is the inbuilt backup utility that will saves automatically at regular interval. When the time machine does not works you are free to use the Mac data recovery software. It is a powerful software that scans your Mac drive for lost data and show them in the preview. Select the files you want and restore them. You can use the software whenever macbook pro crashes on startup, so download the software and recover lost files.